Hi ihechi,

Using the article i have modified the sample code which suit your requirement.

Note: If you save the file in the folder path, then it will be saved in the server folder after publish.

Refer below sample.

HTML

<div id="Grid">
    <table cellspacing="0" cellpadding="2" style="border-collapse: collapse; border: 1px solid #ccc; font-size: 9pt;">
        <tr>
            <th style="background-color: #B8DBFD; border: 1px solid #ccc">Customer Id</th>
            <th style="background-color: #B8DBFD; border: 1px solid #ccc">Name</th>
            <th style="background-color: #B8DBFD; border: 1px solid #ccc">Country</th>
        </tr>
        <tr>
            <td style="width: 120px; border: 1px solid #ccc">1</td>
            <td style="width: 150px; border: 1px solid #ccc">John Hammond</td>
            <td style="width: 120px; border: 1px solid #ccc">United States</td>
        </tr>
        <tr>
            <td style="width: 120px; border: 1px solid #ccc">2</td>
            <td style="width: 150px; border: 1px solid #ccc">Mudassar Khan</td>
            <td style="width: 120px; border: 1px solid #ccc">India</td>
        </tr>
        <tr>
            <td style="width: 120px; border: 1px solid #ccc">3</td>
            <td style="width: 150px; border: 1px solid #ccc">Suzanne Mathews</td>
            <td style="width: 120px; border: 1px solid #ccc">France</td>
        </tr>
        <tr>
            <td style="width: 120px; border: 1px solid #ccc">4</td>
            <td style="width: 150px; border: 1px solid #ccc">Robert Schidner</td>
            <td style="width: 120px; border: 1px solid #ccc">Russia</td>
        </tr>
    </table>
</div>
<br />
<asp:HiddenField ID="hfGridHtml" runat="server" />
<asp:Button ID="btnExport" runat="server" Text="Send Email" OnClick="SendEmail" />
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript">
    $(function () {
        $("[id*=btnExport]").click(function () {
            $("[id*=hfGridHtml]").val($("#Grid").html());
        });
    });
</script>

Namespaces

C#

using System.IO;
using System.Net;
using System.Net.Mail;
using iTextSharp.text;
using iTextSharp.text.pdf;
using iTextSharp.tool.xml;

VB.Net

Imports System.IO
Imports System.Net
Imports System.Net.Mail
Imports iTextSharp.text
Imports iTextSharp.text.pdf
Imports iTextSharp.tool.xml

Code

C#

protected void SendEmail(object sender, EventArgs e)
{
    string fileName = "HTML.pdf";
    string filePath = Server.MapPath(string.Format("~/Files/{0}", fileName));
    using (FileStream stream = new FileStream(filePath, FileMode.Create))
    {
        StringReader sr = new StringReader(Request.Form[hfGridHtml.UniqueID]);
        Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);
        PdfWriter writer = PdfWriter.GetInstance(pdfDoc, stream);
        pdfDoc.Open();
        XMLWorkerHelper.GetInstance().ParseXHtml(writer, pdfDoc, sr);
        pdfDoc.Close();
        stream.Close();
    }

    // Sending email code.
    MailMessage mm = new MailMessage("sender.com", "receiver@gmail.com");
    mm.Subject = "HTML Exported PDF";
    mm.Body = "HTML Exported PDF Attachment";
    mm.Attachments.Add(new Attachment(filePath));
    mm.IsBodyHtml = true;
    SmtpClient smtp = new SmtpClient();
    smtp.Host = "smtp.gmail.com";
    smtp.EnableSsl = true;
    NetworkCredential NetworkCred = new NetworkCredential();
    NetworkCred.UserName = "sender@gmail.com";
    NetworkCred.Password = "<passord>";
    smtp.UseDefaultCredentials = true;
    smtp.Credentials = NetworkCred;
    smtp.Port = 587;
    smtp.Send(mm);
}

VB.Net

Protected Sub SendEmail(ByVal sender As Object, ByVal e As EventArgs)
    Dim fileName As String = "HTML.pdf"
    Dim filePath As String = Server.MapPath(String.Format("~/Files/{0}", fileName))
    Using stream As FileStream = New FileStream(filePath, FileMode.Create)
        Dim sr As StringReader = New StringReader(Request.Form(hfGridHtml.UniqueID))
        Dim pdfDoc As Document = New Document(PageSize.A4, 10.0F, 10.0F, 10.0F, 0F)
        Dim writer As PdfWriter = PdfWriter.GetInstance(pdfDoc, stream)
        pdfDoc.Open()
        XMLWorkerHelper.GetInstance().ParseXHtml(writer, pdfDoc, sr)
        pdfDoc.Close()
        stream.Close()
    End Using

    ' Sending email code.
    Dim mm As MailMessage = New MailMessage("sender.com", "receiver@gmail.com")
    mm.Subject = "HTML Exported PDF"
    mm.Body = "HTML Exported PDF Attachment"
    mm.Attachments.Add(New Attachment(filePath))
    mm.IsBodyHtml = True
    Dim smtp As SmtpClient = New SmtpClient()
    smtp.Host = "smtp.gmail.com"
    smtp.EnableSsl = True
    Dim NetworkCred As NetworkCredential = New NetworkCredential()
    NetworkCred.UserName = "sender@gmail.com"
    NetworkCred.Password = "<passord>"
    smtp.UseDefaultCredentials = True
    smtp.Credentials = NetworkCred
    smtp.Port = 587
    smtp.Send(mm)
End Sub

Screenshot